St. Antoine graduated from Fordham College and the University of Michigan Law School.
He is active in labor arbitration of union and management disputes, acting as arbitrator in dozens of Major League Baseball arbitration matters, the parties of which have included the league and individual teams, agents, and players, including Curt Schilling, Sandy Alomar Jr., and Darryl Strawberry.
St. Antoine was the official draftsperson for the Model Employment Termination Act (META).
[1] St. Antoine has taught as a visiting faculty member at Cambridge, Duke, George Washington, and Tokyo University, and in Salzburg.
He serves on the internal board of review of the United Automobile Workers, a UAW-constitutional agency that provides redress for aggrieved union members.